A system for detecting interference includes an automatic gain control (AGC) module, a peak detection module, and a control module. The AGC module selectively generates a gain-locked signal when an input signal is received. The peak detector module communicates with the AGC module and selectively generates a peak-detect signal. The control module communicates with the AGC module and the peak detector module and generates a control signal when the control module does not receive the gain-locked signal within a predetermined time after receiving the peak-detect signal.